Difference between revisions of "Derbi"

m (add brand category)
Line 1: Line 1:
 
{{TOCright}}
 
{{TOCright}}
 
==Engine Intake Info==
 
==Engine Intake Info==
*'86 and '87 SLE should be a flat reed engine (the flat reed engine came into play in '86)
+
*'some late 85's, 86's and '87 SLE should be a flat reed engine (the flat reed engine came into play in late '85)
**You can tell if it has a steel rear swingarm on a Variant step through, it is a flat reed
+
**If the engine and swing arm move with the suspension, it is a flat reed
**If it has an alloy rear swingarm, it's piston port or pyramid reed
+
**If the motor is rigidly attached to the frame it's piston port or pyramid reed
 
*the 81 SLE was pyramid reed
 
*the 81 SLE was pyramid reed
 
*Derbi RD's were pyramid reed  
 
*Derbi RD's were pyramid reed  
 
*Derbi Diablos and Lagunas piston port
 
*Derbi Diablos and Lagunas piston port
 
*the Derbi DS50 scooter is flat reed
 
*the Derbi DS50 scooter is flat reed
 
-''quote by well known derbi connoisseur''
 
  
 
==Technical Specs==
 
==Technical Specs==

Revision as of 18:10, 6 October 2009

Engine Intake Info

  • 'some late 85's, 86's and '87 SLE should be a flat reed engine (the flat reed engine came into play in late '85)
    • If the engine and swing arm move with the suspension, it is a flat reed
    • If the motor is rigidly attached to the frame it's piston port or pyramid reed
  • the 81 SLE was pyramid reed
  • Derbi RD's were pyramid reed
  • Derbi Diablos and Lagunas piston port
  • the Derbi DS50 scooter is flat reed

Technical Specs

Piston port engines

  • cylinder inducted
  • stroke: 43mm
  • bore: 38mm
  • displacement: 48.7cc
  • compression 8.5:1
  • direction of rotation: counter clockwise facing magneto

Download the repair manual for Derbi piston port motors here.

Pyramid reed engines

  • Pyramid 3-reed valve, Crankcase mounted
  • stroke: 43mm
  • bore: 38mm
  • displacement: 48.6cc
  • compression 8.5:1
  • direction of rotation: counter clockwise facing magneto.

Flat reed engines

  • Crankcase 2-reed valve induction with triple transfer port distribution
  • stroke: 40mm
  • bore: 39.87mm
  • displacement: 49cc
  • compression: 10:1
  • direction of rotation: clockwise facing magneto.
  • Max engine RPM: 6500
  • Flywheel nut is reverse thread

See a PDF file of the flat reed engine repair manual here.

Make a Water-Cooled Derbi

Please see this discussion from the forums.

This article is a stub.
You can help the Moped Wiki by expanding it.